DIN EN ISO 1675-1998 Plastics - Liquid resins - Determination of density by the pyknometer method (ISO 1675 1985) German version EN ISO 1675 1998《塑料 液态树脂 用比重计法测定浓度》.pdf

1、DEUTSCHE NORM October 1998 Plastics - Liquid resins Determination of density by the pycnometer method (IS0 1675 : 1985) English version of DIN EN IS0 1675 DIN EN IS0 1675 - ICs 83.080.1 O Descriptors: Plastics, resins, density, pycnometer, testing. Kunststoffe - Flssige Harze - Bestimmung der Dichte

2、 nach dem Pyknometer-Verfahren (IS0 1675 : 1985) European Standard EN IS0 1675 : 1998 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been published in accordance with a decision taken by CEN/TC 249 to adopt, without alteration, Internatio

3、nal Standard IS0 1675 as a European Standard. The responsible German body involved in its preparation was the Normenausschu Kunststoffe (Plastics St an dards Com mitt ee) , Tech ni cal Committee Physikalische, rheologische und analytische Prfungen. EN comprises 3 pages. No pari of this standard may

4、be reproduced without the prior permission of Ref. No. DIN EN IS0 1675 : 1998-1 Y Deutsches Institut fr Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 05 Sales No. 1105 04.99 EUROPEAN STANDARD NORME EUROP

5、ENNE EUROPISCHE NORM EN IS0 1675 July 1998 ICs 83.080.1 O Descriptors: Plastics, resins, density, pycnometer, testing. English version Plastics - Liquid resins Determination of density by the pycnometer method (IS0 1675 : 1985) Plastiques - Rsines liquides - Dter- mination de la masse volumique par

6、la mthode du pycnomtre (IS0 1675 : 1985) Kunststoffe - Flssige Harze - Bestim- mung der Dichte nach dem Pykno- meter-Verfahren (IS0 1675 : 1985) This European Standard was approved by CEN on 1998-06-1 2. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the con

7、ditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in thr

8、ee official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Au

9、stria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr

10、Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1998. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN IS0 1675 : 1998 E Page 2 EN IS0 1675 : 1998 Foreword International Standard IS0 1675 : 1985 which was prepar

11、ed by ISO/TC 61 Plastics of the International Organization for Standardization, has been adopted by Technical Committee CEN/TC 249 Plastics, the Secretariat of which is held by IBN, as a European Standard. This European Standard shall be given the status of a national standard, either by publication

12、 of an identical text or by endorsement, and conflicting national standards withdrawn, by January 1999 at the latest. In accordance with the CENKENELEC Internal Regulations, the national standards organizations of the follow- ing countries are bound to implement this European Standard: Austria, Belg

13、ium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. Plastics - Liquid resins - Determination of density by the pycnometer method, Endorsement notice The text of

14、 the International Standard IS0 1675 : 1985 was approved by CEN as a European Standard without any modification. 1 Scope and field of application This International Standard specifies a method for the deter- mination of the density of liquid resins using a pyknometer. 2 Definition density; mass dens

15、ity : Mass divided by volume. (Definition taken from IS0 31 /3.) 4.2 Funnel, whose stem, the internal diameter of which shall be as large as possible, penetrates into the pyknometer exactly down to the level of the graduation mark. 4.3 Balance, accurate to 0,2 mg. 4.4 Water-bath, capable of being ma

16、intained at 23 k 0.1 OC. 4.5 Fine filter paper. It may be expressed in grams per millilitre (g/rnl).* 4.6 Erlenmeyer), stoppered, of capacity 200 to 600 ml. Transparent conical flask, with wide neck (for example 3 Principle Determination of the mass at 23 OC of resin contained in a pyknometer of kno

17、wn volume. NOTE - This method is easily applicable to low and medium viscosity resins. Difficulties in the procedure exist for high viscosity resins. 4 Apparatus 4.1 Pyknometer, consisting of a precision graduated flask. The height of the neck above the graduation mark shall not ex- ceed 50 mm. The

18、graduated volume of the pyknometer at 23 f 0,l OC, measured by weighing the mass of distilled water contained in the pyknometer at this temperature, shall be known to within 1 part in 10 o00 (see note to clause 6). The Pyknometers normally used have the characteristics given in the following table.

19、I I Internal diameter I Volume of flask, V of neck, d 1- rnl I mm I 1 I r- 50 k 0.05 11 I 1 100 I 0.1 13 I 1 5 Procedure 5.1 Preparation of resin Place at least 150 g of resin in the conical flask 14.6) and inspect the contents of the flask for bubbles. If any bubbles are ob- served, allow the stopp

20、ered flask to stand long enough for all the bubbles to dissipate before or while bringing the flask and its contents to 23 f 0.1 OC by immersion in the water bath (4.4). NOTE - To accelerate the release of bubbles, especially any adjacent to the walls of the flask, disturb or detach them using a fin

21、e wire in- serted through the neck of the flask. 5.2 Measurement of density Weigh the empty pyknometer (4.1 to the nearest 0,2 rng. Place the pyknometer in the water-bath (4.4) and fill the pyknometer with resin using the funnel (4.2). The following points require close attention : a) bubbles shall

22、not be present in the resin in the pyknometer: if bubbles form, wait for them to disappear, if necessary rubbing the walls of the pyknometer with a fine metal wire, or, better still, empty the pyknometer, clean it and refill; * 1 g/ml = 1 O00 kg/d Page 3 EN IS0 1675 : 1998 b) fill the pyknometer exa

23、ctly to the graduation mark; c) neck of the pyknometer. remove the funnel without letting its stem touch the Wait at least 30 min and check that the level in the pyknometer remains at the graduation mark. If necessary, add a few more drops of resin or remove excess resin by means of fine filter pape

24、r (4.51, which may be wound around a glass rod. Weigh the filled pyknometer to the nearest 0,2 mg. 6 Expression of results The density at 23 OC, o, expressed in grams per millilitre, is given by the equation ml - mo e23 = + e, where m, is the apparent mass, in grams, of the filled pyknometer at 23 O

25、C; mg is the apparent mass, in grams, of the empty pyknometer at 23 OC; e, is the density of air at 23 “C. = 0,001 2 g/ml (air buoyancy correctioni; V is the volume, in millilitres, of the pyknometer at 23 OC. Give the result to three places of decimals. NOTE - To check or determine the volume of th

26、e pyknometer at 23 OC using distilled water, use the equation where m2 is the apparent mass, in grams, of the pyknometer filled with distilled water at 23 OC; ge is the density of distilled water at 23 OC = 0,997 6 g/ml. 7 Test report The test report shall contain the following information : al a reference to this International Standard; b) complete identification of the material tested; c) the density at 23 OC, en, expressed in grams per millilitre; dl details of procedure not specified in this International Standard and any incidents likely to have influenced the results.